Portion of a watch



FIG. 1 is a perspective view of a portion of a watch showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is an end view thereof, the opposite end view being substantially a mirror image thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a side view thereof taken opposite FIG. 3.

The broken line showing of the button and watch ends is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a watch, as shown and described. 